Mechanical separation device with screen washing system

An automated washing system comprising:

• one or more pumps;
• a plurality of wash fluid lines in fluid communication with the one or more pumps;
• a plurality of valves each of the plurality of valves configured to regulate a flow of a wash fluid through a corresponding one of the plurality of wash fluid lines;
• a mechanical separation device comprising:
• a housing with a feed inlet at a first end section of the housing and a discharge outlet at a second end section of the housing, the feed inlet configured to receive a slurry comprising solids within a liquid medium,
• a screen positioned within the housing to separate at least a portion of the liquid medium from the solids,
• a rotary assembly within the housing, the rotary assembly configured to move the solids and the liquid medium along an axial length of the housing toward the discharge outlet,
• a plurality of wash bars within the housing and positioned adjacent the screen, wherein each of the plurality of wash bars is coupled to a corresponding one of the plurality of wash fluid lines, wherein the plurality of wash bars comprise between four and eight wash bars, inclusive, and wherein the plurality of wash bars are arranged in a spaced relationship around an exterior of the screen, and
• a plurality of nozzles spaced along each of the plurality of wash bars, wherein each of the plurality of nozzles is configured to discharge the wash fluid against the screen;
• and
• a controller configured to control operation of at least the one or more pumps to pump the wash fluid through the plurality of wash fluid lines to the plurality of wash bars and to the plurality of nozzles, wherein the controller controls the plurality of valves regulating the flow through the plurality of wash fluid lines to stagger the flow of the wash fluid to the plurality of wash bars such that only one or two of the plurality of wash bars receives the flow of the wash fluid at a time, wherein the controller controls an interval between discharge of the wash fluid and a subsequent discharge of the wash fluid from a same nozzle to occur between 1 time/hour and 1 time/day, inclusive.

An automated washing system comprising:

• one or more pumps,
• a plurality of wash fluid lines in fluid communication with the one or more pumps;
• a plurality of valves each of the plurality of valves configured to regulate a flow of a wash fluid through a corresponding one of the plurality of wash fluid lines;
• a mechanical separation device comprising:
• a housing with a feed inlet at a first end section of the housing and a discharge outlet at a second end section of the housing, the feed inlet configured to receive a slurry comprising solids within a liquid medium,
• a screen positioned within the housing to separate at least a portion of the liquid medium from the solids,
• a rotary assembly within the housing, the rotary assembly configured to move the solids and the liquid medium along an axial length of the housing toward the discharge outlet,
• a plurality of wash bars within the housing and positioned adjacent the screen, wherein each of the plurality of wash bars is coupled to a corresponding one of the plurality of wash fluid lines, wherein the plurality of wash bars comprise between four and eight wash bars, inclusive, and wherein the plurality of wash bars are arranged in a spaced relationship around an exterior of the screen, and
• a plurality of nozzles spaced along each of the plurality of wash bars, wherein each of the plurality of nozzles is configured to discharge the wash fluid against the screen;
• and
• a controller configured to control operation of at least the one or more pumps to pump the wash fluid through the plurality of wash fluid lines to the plurality of wash bars and to the plurality of nozzles, wherein the controller controls the plurality of valves regulating the flow through the plurality of wash fluid lines to stagger the flow of the wash fluid to the plurality of wash bars such that only one or two of the plurality of wash bars receives the flow of the wash fluid at a time, wherein the one or more pumps are configured to provide the wash fluid to each of the plurality of nozzles at a discharge pressure of between 200 pounds/in2 gauge and 500 pounds/in2 gauge, inclusive.